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Early changes of parotid density and volume predict modifications at the end of therapy and intensity of acute xerostomia

Purpose To quantitatively assess the predictive power of early variations of parotid gland volume and density on final changes at the end of therapy and, possibly, on acute xerostomia during IMRT for head-neck cancer. Materials and methods Data of 92 parotids (46 patients) were available. Kinetics o...

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Published in:Strahlentherapie und Onkologie 2014-10, Vol.190 (11), p.1001-1007
Main Authors: Belli, Maria Luisa, Scalco, Elisa, Sanguineti, Giuseppe, Fiorino, Claudio, Broggi, Sara, Dinapoli, Nicola, Ricchetti, Francesco, Valentini, Vincenzo, Rizzo, Giovanna, Cattaneo, Giovanni Mauro
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creator Belli, Maria Luisa
Scalco, Elisa
Sanguineti, Giuseppe
Fiorino, Claudio
Broggi, Sara
Dinapoli, Nicola
Ricchetti, Francesco
Valentini, Vincenzo
Rizzo, Giovanna
Cattaneo, Giovanni Mauro
description Purpose To quantitatively assess the predictive power of early variations of parotid gland volume and density on final changes at the end of therapy and, possibly, on acute xerostomia during IMRT for head-neck cancer. Materials and methods Data of 92 parotids (46 patients) were available. Kinetics of the changes during treatment were described by the daily rate of density (rΔρ) and volume (rΔvol) variation based on weekly diagnostic kVCT images. Correlation between early and final changes was investigated as well as the correlation with prospective toxicity data (CTCAEv3.0) collected weekly during treatment for 24/46 patients. Results A higher rΔρ was observed during the first compared to last week of treatment (−0,50 vs −0,05HU, p -value = 0.0001). Based on early variations, a good estimation of the final changes may be obtained (Δρ: AUC = 0.82, p = 0.0001; Δvol: AUC = 0.77, p  = 0.0001). Both early rΔρ and rΔvol predict a higher “mean” acute xerostomia score (≥ median value, 1.57; p -value = 0.01). Median early density rate changes for patients with mean xerostomia score ≥ / 
doi_str_mv 10.1007/s00066-014-0669-2
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Materials and methods Data of 92 parotids (46 patients) were available. Kinetics of the changes during treatment were described by the daily rate of density (rΔρ) and volume (rΔvol) variation based on weekly diagnostic kVCT images. Correlation between early and final changes was investigated as well as the correlation with prospective toxicity data (CTCAEv3.0) collected weekly during treatment for 24/46 patients. Results A higher rΔρ was observed during the first compared to last week of treatment (−0,50 vs −0,05HU, p -value = 0.0001). Based on early variations, a good estimation of the final changes may be obtained (Δρ: AUC = 0.82, p = 0.0001; Δvol: AUC = 0.77, p  = 0.0001). Both early rΔρ and rΔvol predict a higher “mean” acute xerostomia score (≥ median value, 1.57; p -value = 0.01). Median early density rate changes for patients with mean xerostomia score ≥ / &lt; 1.57 were −0.98 vs −0.22 HU/day respectively ( p  = 0.05). Conclusions Early density and volume variations accurately predict final changes of parotid glands. A higher longitudinally assessed score of acute xerostomia is well predicted by higher rΔρ and rΔvol in the first two weeks of treatment: best cut-off values were −0.50 HU/day and −380 mm 3 /day for rΔρ and rΔvol respectively. Further studies are necessary to definitively assess the potential of early density/volume changes in identifying more sensitive patients at higher risk of experiencing xerostomia.</description><identifier>ISSN: 0179-7158</identifier><identifier>EISSN: 1439-099X</identifier><identifier>DOI: 10.1007/s00066-014-0669-2</identifier><identifier>PMID: 24756139</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Absorptiometry, Photon ; Acute Disease ; Early Diagnosis ; Female ; Head and Neck Neoplasms - diagnostic imaging ; Head and Neck Neoplasms - radiotherapy ; Humans ; Italy ; Male ; Medicine ; Medicine &amp; Public Health ; Oncology ; Organ Size - radiation effects ; Original Article ; Parotid Gland - diagnostic imaging ; Parotid Gland - radiation effects ; Radiation Injuries - diagnostic imaging ; Radiation Injuries - etiology ; Radiotherapy ; Radiotherapy, Conformal - adverse effects ; Reproducibility of Results ; Sensitivity and Specificity ; Tomography, X-Ray Computed ; United States ; Xerostomia - diagnostic imaging ; Xerostomia - etiology</subject><ispartof>Strahlentherapie und Onkologie, 2014-10, Vol.190 (11), p.1001-1007</ispartof><rights>Springer-Verlag Berlin Heidelberg 2014</rights><rights>Springer Heidelberg Berlin 2014</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c339t-7f814bfbfc7462c71c1b628710894b6b0dfdc930b6cabdd9991fec85447922363</citedby><cites>FETCH-LOGICAL-c339t-7f814bfbfc7462c71c1b628710894b6b0dfdc930b6cabdd9991fec85447922363</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24756139$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Belli, Maria Luisa</creatorcontrib><creatorcontrib>Scalco, Elisa</creatorcontrib><creatorcontrib>Sanguineti, Giuseppe</creatorcontrib><creatorcontrib>Fiorino, Claudio</creatorcontrib><creatorcontrib>Broggi, Sara</creatorcontrib><creatorcontrib>Dinapoli, Nicola</creatorcontrib><creatorcontrib>Ricchetti, Francesco</creatorcontrib><creatorcontrib>Valentini, Vincenzo</creatorcontrib><creatorcontrib>Rizzo, Giovanna</creatorcontrib><creatorcontrib>Cattaneo, Giovanni Mauro</creatorcontrib><title>Early changes of parotid density and volume predict modifications at the end of therapy and intensity of acute xerostomia</title><title>Strahlentherapie und Onkologie</title><addtitle>Strahlenther Onkol</addtitle><addtitle>Strahlenther Onkol</addtitle><description>Purpose To quantitatively assess the predictive power of early variations of parotid gland volume and density on final changes at the end of therapy and, possibly, on acute xerostomia during IMRT for head-neck cancer. Materials and methods Data of 92 parotids (46 patients) were available. Kinetics of the changes during treatment were described by the daily rate of density (rΔρ) and volume (rΔvol) variation based on weekly diagnostic kVCT images. Correlation between early and final changes was investigated as well as the correlation with prospective toxicity data (CTCAEv3.0) collected weekly during treatment for 24/46 patients. Results A higher rΔρ was observed during the first compared to last week of treatment (−0,50 vs −0,05HU, p -value = 0.0001). Based on early variations, a good estimation of the final changes may be obtained (Δρ: AUC = 0.82, p = 0.0001; Δvol: AUC = 0.77, p  = 0.0001). Both early rΔρ and rΔvol predict a higher “mean” acute xerostomia score (≥ median value, 1.57; p -value = 0.01). Median early density rate changes for patients with mean xerostomia score ≥ / &lt; 1.57 were −0.98 vs −0.22 HU/day respectively ( p  = 0.05). Conclusions Early density and volume variations accurately predict final changes of parotid glands. A higher longitudinally assessed score of acute xerostomia is well predicted by higher rΔρ and rΔvol in the first two weeks of treatment: best cut-off values were −0.50 HU/day and −380 mm 3 /day for rΔρ and rΔvol respectively. Further studies are necessary to definitively assess the potential of early density/volume changes in identifying more sensitive patients at higher risk of experiencing xerostomia.</description><subject>Absorptiometry, Photon</subject><subject>Acute Disease</subject><subject>Early Diagnosis</subject><subject>Female</subject><subject>Head and Neck Neoplasms - diagnostic imaging</subject><subject>Head and Neck Neoplasms - radiotherapy</subject><subject>Humans</subject><subject>Italy</subject><subject>Male</subject><subject>Medicine</subject><subject>Medicine &amp; Public Health</subject><subject>Oncology</subject><subject>Organ Size - radiation effects</subject><subject>Original Article</subject><subject>Parotid Gland - diagnostic imaging</subject><subject>Parotid Gland - radiation effects</subject><subject>Radiation Injuries - diagnostic imaging</subject><subject>Radiation Injuries - etiology</subject><subject>Radiotherapy</subject><subject>Radiotherapy, Conformal - adverse effects</subject><subject>Reproducibility of Results</subject><subject>Sensitivity and Specificity</subject><subject>Tomography, X-Ray Computed</subject><subject>United States</subject><subject>Xerostomia - diagnostic imaging</subject><subject>Xerostomia - etiology</subject><issn>0179-7158</issn><issn>1439-099X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNp1kMtKxDAUhoMoOl4ewI0EXFeTNJM0S5HxAgNuFNyFNBcnw7SpSSrO2xvpKG5cncD5_v-ED4BzjK4wQvw6IYQYqxCmVZmiIntghmktKiTE6z6YIcxFxfG8OQLHKa0RwowKegiOCOVzhmsxA9uFipst1CvVv9kEg4ODiiF7A43tk89bqHoDP8Jm7CwcojVeZ9gF453XKvvQJ6gyzCsLbeFKvDyjGqaY7_OupCyUHrOFnzaGlEPn1Sk4cGqT7NlunoCXu8Xz7UO1fLp_vL1ZVrquRa64azBtXes0p4xojjVuGWk4Ro2gLWuRcUaLGrVMq9YYIQR2VjdzSrkgpGb1CbiceocY3kebslyHMfblpMS8OBCME1EoPFG6_C9F6-QQfafiVmIkv2XLSbYssuW3bElK5mLXPLadNb-JH7sFIBOQyqr4jX9O_9v6Bca8i8A</recordid><startdate>20141001</startdate><enddate>20141001</enddate><creator>Belli, Maria Luisa</creator><creator>Scalco, Elisa</creator><creator>Sanguineti, Giuseppe</creator><creator>Fiorino, Claudio</creator><creator>Broggi, Sara</creator><creator>Dinapoli, Nicola</creator><creator>Ricchetti, Francesco</creator><creator>Valentini, Vincenzo</creator><creator>Rizzo, Giovanna</creator><creator>Cattaneo, Giovanni Mauro</creator><general>Springer Berlin Heidelberg</general><general>Springer Nature B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7RV</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8AO</scope><scope>8C1</scope><scope>8FE</scope><scope>8FG</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>KB0</scope><scope>M0S</scope><scope>M1P</scope><scope>NAPCQ</scope><scope>P5Z</scope><scope>P62</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope></search><sort><creationdate>20141001</creationdate><title>Early changes of parotid density and volume predict modifications at the end of therapy and intensity of acute xerostomia</title><author>Belli, Maria Luisa ; 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Materials and methods Data of 92 parotids (46 patients) were available. Kinetics of the changes during treatment were described by the daily rate of density (rΔρ) and volume (rΔvol) variation based on weekly diagnostic kVCT images. Correlation between early and final changes was investigated as well as the correlation with prospective toxicity data (CTCAEv3.0) collected weekly during treatment for 24/46 patients. Results A higher rΔρ was observed during the first compared to last week of treatment (−0,50 vs −0,05HU, p -value = 0.0001). Based on early variations, a good estimation of the final changes may be obtained (Δρ: AUC = 0.82, p = 0.0001; Δvol: AUC = 0.77, p  = 0.0001). Both early rΔρ and rΔvol predict a higher “mean” acute xerostomia score (≥ median value, 1.57; p -value = 0.01). Median early density rate changes for patients with mean xerostomia score ≥ / &lt; 1.57 were −0.98 vs −0.22 HU/day respectively ( p  = 0.05). Conclusions Early density and volume variations accurately predict final changes of parotid glands. A higher longitudinally assessed score of acute xerostomia is well predicted by higher rΔρ and rΔvol in the first two weeks of treatment: best cut-off values were −0.50 HU/day and −380 mm 3 /day for rΔρ and rΔvol respectively. Further studies are necessary to definitively assess the potential of early density/volume changes in identifying more sensitive patients at higher risk of experiencing xerostomia.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>24756139</pmid><doi>10.1007/s00066-014-0669-2</doi><tpages>7</tpages></addata></record>
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1439-099X
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subjects Absorptiometry, Photon
Acute Disease
Early Diagnosis
Female
Head and Neck Neoplasms - diagnostic imaging
Head and Neck Neoplasms - radiotherapy
Humans
Italy
Male
Medicine
Medicine & Public Health
Oncology
Organ Size - radiation effects
Original Article
Parotid Gland - diagnostic imaging
Parotid Gland - radiation effects
Radiation Injuries - diagnostic imaging
Radiation Injuries - etiology
Radiotherapy
Radiotherapy, Conformal - adverse effects
Reproducibility of Results
Sensitivity and Specificity
Tomography, X-Ray Computed
United States
Xerostomia - diagnostic imaging
Xerostomia - etiology
title Early changes of parotid density and volume predict modifications at the end of therapy and intensity of acute xerostomia
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